Charles A Graham

US Patent:

60237368, Feb 8, 2000

Filed:

Dec 19, 1997

Appl. No.:

8/995157

Inventors:

Shawn Michael Lambeth - Pine Island MN
Charles Scott Graham - Rochester MN
Daniel Frank Moertl - Rochester MN
Paul Edward Movall - Rochester MN
Gregory Michael Nordstrom - Oronoco MN

Assignee:

International Business Machines Corporation - Armonk NY

International Classification:

G06F 1310

US Classification:

710 10

Abstract:

An apparatus, system and method permitting dynamic configuration of I/O device adapters connected to a bus utilizes a function configuration register to store a READY/NOT READY status for each of the I/O device adapters. Upon the occurrence of a reset condition, dynamic configuration decision logic detects which I/O device adapters are connected to the bus, determines configuration parameters for each connected I/O device adapter, initializes the configuration space for each connected I/O device adapter, and then sets a corresponding flag in the function configuration register to indicate ready status. An I/O device driver interrupts a configuration process to examine the function configuration register. If ready status can be confirmed from this function configuration register within a time out period, then the configuration process may proceed; otherwise, a device error recovery process is initiated.